UILabel text won't display

问题

I'm having trouble in an iOS app I'm building with UILabels: despite initializing them the text I programmed won't show up and I'm at wits' end about what I should do.

For example, this is one of the app's screens in which I have this problem:

Welcome.m

@interface Welcome()

@end

@implementation Welcome

-(void) viewdidLoad{
    [super viewDidLoad];
    UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 140, 47)];
    [self.view addSubview: label];
    label.text = @"Benvinguts a la pràctica de iOS I";
    label.numberOfLines = 4;

}

-(IBAction) buttonPressed: (id) sender
{

   [self performSegueWithIdentifier:@"Tutorial1" sender:self];
}


@end

Could you help me out in fixing this?

回答1:

You need to add a textColor:

   UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 140, 47)];
    [self.view addSubview: label];
    label.text = @"Benvinguts a la pràctica de iOS I";
    label.numberOfLines = 4;
    label.textColor = [UIColor blackColor];

回答2:

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 140, 47)];
[self.view addSubview: label];
label.text = @"Benvinguts a la pràctica de iOS I";
label.numberOfLines = 0;
[label SizeToFit];

You may use like this (label size manage by itself.)

回答3:

try this

UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 140, 47)];
label.text = @"Benvinguts a la pràctica de iOS I";
label.numberOfLines = 4;
[self.view addSubview: label];

or maybe your label appears under the NavigationController. Try dropping below

 UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 100, 140, 47)];

来源：https://stackoverflow.com/questions/23591326/uilabel-text-wont-display

标签

ios

uilabel

implementation